In the District of Columbia, you will pay federal taxes up to 37% and District income taxes up to 10.75%, with no additional local taxes beyond the District's income tax. Lottery prizes over $5,000 trigger immediate federal withholding of 24%, while the District treats winnings as ordinary income subject to its progressive tax rates ranging from 4% to 10.75% depending on your total income. The District also withholds taxes upfront on large prizes, typically at rates reflecting your expected bracket. Your actual liability is settled when you file your tax return, potentially adjusting for deductions or credits. For example, imagine you win a $1 million lump-sum prize as a single filer with no other income: the federal government withholds $240,000 (24%), and the District withholds around $107,500 (10.75%), leaving you with about $652,500 initially. However, when filing, federal taxes might climb to $370,000 total if you hit the top bracket, plus full District tax. While this is general information based on 2025 tax brackets, we recommend consulting a tax professional for your specific situation.